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Old 12-16-2010, 02:21 AM
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P1670

My truck wouldn't start earlier, it was cranking like mad as it had been running 15min before, however it didnt fuel,so I poped the hood did a quick check, all looked good. I pulled codes at home and go a P1670 Which was something about a sensor not sending a signal or something generic. However it didn't mention which one, how do I figure out what sensor is giving me trouble?
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  #2  
Old 12-16-2010, 02:28 AM
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Re: P1670

P1670 EF Feedback Signal Not Detected
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Old 12-16-2010, 02:37 AM
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Re: P1670

DTC P1668 and P1670 indicates that a communication error has occurred between the PCM and the IDM.

Possible causes:
Open fuse, IDM relay, Open or shorted IDM enable circuit, IDM powering circuit, PCM

Check for other codes. Key on, engine off.

l Perform KOEO On-Demand Self Test and retrieve Continuous DTCs.
If DTC P1298 is also present, REPLACE the IDM.
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Old 12-16-2010, 03:34 AM
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Re: P1670

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Originally Posted by PSDEng View Post
DTC P1668 and P1670 indicates that a communication error has occurred between the PCM and the IDM.

Possible causes:
Open fuse, IDM relay, Open or shorted IDM enable circuit, IDM powering circuit, PCM

Check for other codes. Key on, engine off.

l Perform KOEO On-Demand Self Test and retrieve Continuous DTCs.
If DTC P1298 is also present, REPLACE the IDM.
Thanks guys!

I did the IDM mod a few months back, I wonder if this is related. This must be why it wasn't getting fuel and starting earlier. After a minute or so it worked for the hr or so it took to get me home, so maybe a sporadicly loose connection?
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Old 12-16-2010, 04:40 AM
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Re: P1670

I just had the same issue, check your batts, batt connections, idm connections. My issue was i had 1 dead battery, i was throwing codes p1668 and p1670. Since i changed my batts i haven't gotten those codes. Good luck
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